Deviation from the Fourier law in room-temperature heat pulse experiments

Soma Both; Balázs Czél; Tamás Fülöp; Gyula Gróf; Ákos Gyenis; Róbert Kovács; Peter Ván; József Verhás

doi:10.1515/jnet-2015-0035

Published by De Gruyter December 15, 2015

Deviation from the Fourier law in room-temperature heat pulse experiments

Soma Both , Balázs Czél , Tamás Fülöp , Gyula Gróf , Ákos Gyenis , Róbert Kovács , Peter Ván and József Verhás

From the journal Journal of Non-Equilibrium Thermodynamics

https://doi.org/10.1515/jnet-2015-0035

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Abstract

We report heat pulse experiments at room temperature that cannot be described by Fourier's law. The experimental data are modeled properly by the Guyer–Krumhansl equation, in its over-diffusion regime. The phenomenon may be due to conduction channels with differing conductivities and parallel to the direction of the heat flux.

Keywords: Flash method; Guyer–Krumhansl equation; heat pulse experiment; over-diffusive regime

Funding source: Hungarian Scientific Research Fund

Award Identifier / Grant number: K104260, K116197, K116375

Received: 2015-6-18

Revised: 2015-11-1

Accepted: 2015-11-6

Published Online: 2015-12-15

Published in Print: 2016-1-1

Deviation from the Fourier law in room-temperature heat pulse experiments

Abstract

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